Straight fluted drill for drilling aluminum alloy

Abstract

The utility model discloses a straight fluted drill for drilling aluminum alloy. One end of a cutter body of the straight fluted drill is a cutter head, the other end of the cutter body is a cylindrical cutter handle, and a first blade and a second blade are formed on the cutter head; a first chip removal main groove and a second chip removal main groove are formed between the first blade section and the second blade section; the first front cutter face is provided with at least one first chip removal auxiliary groove, the first chip removal auxiliary groove vertically penetrates through the front end face of the first blade flap, a lateral opening of the first chip removal auxiliary groove is communicated with the first chip removal main groove, the second front cutter face is provided with at least one second chip removal auxiliary groove, the second chip removal auxiliary groove vertically penetrates through the front end face of the second blade flap, and a lateral opening of the second chip removal auxiliary groove is communicated with the second chip removal main groove. The first chip removal auxiliary grooves and the second chip removal auxiliary grooves on the two sides are staggered in the radial direction. The drill bit has the advantages of being good in chip containing and discharging, rapid and stable in cutting process, small in cutting deformation, high in drilling surface quality, high in product yield and high in cutting efficiency.

Description

Technical Field

[0001] This utility model relates to the field of aluminum alloy workpiece cutting and machining, and in particular to a straight flute drill for aluminum alloy drilling. Background Technology

[0002] Aluminum alloy parts are widely used in industries such as automotive, aerospace, medical devices, shipbuilding, and machine tool manufacturing. Drilling, a machining process for aluminum alloy parts, is performed in a closed environment, making chip breaking, chip removal, cooling, and lubrication challenging. Traditional drills require slow drilling speeds. With the increasing development of the manufacturing industry, there is a growing demand for higher cutting efficiency and better machining quality. However, traditional drills have several drawbacks: First, they produce coarse and long chips that cannot be quickly and promptly removed, resulting in an unstable cutting process, large cutting deformation, and poor hole surface quality. Second, cutting fluid does not easily reach the bottom of the hole and the drill tip, failing to provide sufficient cooling and lubrication, leading to machining at high temperatures, significantly reducing drill life and hole quality. Third, traditional drills have very low cutting speeds, resulting in low cutting efficiency and making them unsuitable for large-scale production. Utility Model Content

[0003] To address one or more of the aforementioned problems, this invention provides a straight flute drill for drilling aluminum alloys.

[0004] According to one aspect of the present invention, a straight flute drill for drilling aluminum alloys includes a cutter body, one end of which is a cutter head and the other end is a cylindrical cutter shank, characterized in that a first cutting edge and a second cutting edge are formed on the cutter head.

[0005] A vertical first chip removal main groove is formed between the first rake face of the first cutting edge and the second cutting edge, and a vertical second chip removal main groove is formed between the second rake face of the second cutting edge and the first cutting edge.

[0006] At least one first chip removal sub-groove is provided on the first rake face. The first chip removal sub-groove penetrates the front end face of the first cutting edge vertically and has a lateral opening that connects to the first chip removal main groove. At least one second chip removal sub-groove is provided on the second rake face. The second chip removal sub-groove penetrates the front end face of the second cutting edge vertically and has a lateral opening that connects to the second chip removal main groove. The radial distances of the first chip removal sub-groove and the second chip removal sub-groove on both sides relative to the central axis of the cutting head are different and they are offset from each other radially.

[0007] In some embodiments, the first rake face is provided with two vertical first chip removal grooves, and the second rake face is provided with one vertical second chip removal groove.

[0008] In some embodiments, the radial distance of the second chip removal groove relative to the central axis of the cutter head is twice the distance between the midpoint of the two first chip removal grooves and the central axis of the cutter head.

[0009] In some embodiments, the centers of the two first chip removal sub-grooves are radially distanced from the central axis of the cutter head at 76% and 36% of the radius, respectively, and the center of the second chip removal sub-grooves is radially distanced from the central axis of the cutter head at 56% of the radius.

[0010] In some embodiments, the width and depth of the first and second chip removal sub-grooves are uniformly 0.4 mm; the length of the chip removal sub-grooves is shorter than the length of the corresponding main chip removal groove.

[0011] In some embodiments, the lengths of the first chip removal groove and the second chip removal groove are 2.5 times the diameter of the cutting head.

[0012] In some embodiments, both the first chip removal sub-groove and the second chip removal sub-groove are rectangular grooves or circular arc grooves.

[0013] In some embodiments, two cutting edges and two vertical chip removal main grooves are symmetrically formed on the cutting head, and the chip removal secondary grooves on the rake faces of the two cutting edges are radially offset from each other.

[0014] A straight flute drill for drilling aluminum alloys includes a cutter body, one end of which is a cutter head and the other end is a cylindrical shank. The cutter head is characterized by having a first cutting edge and a second cutting edge formed thereon. A vertical first main chip removal groove is formed between the first rake face of the first cutting edge and the second cutting edge. A vertical second main chip removal groove is formed between the second rake face of the second cutting edge and the first cutting edge. The first and second rake faces are provided with a plurality of vertical first and second secondary chip removal grooves at equal radial intervals.

[0015] In some embodiments, the cutting head and the shank are arranged coaxially, and the cutting body forms two vertical cooling holes that penetrate the end faces of the cutting head and the shank.

[0016] This straight flute drill for aluminum alloy drilling features a first and second main chip removal flute for effective chip containment and removal. Staggered first and second secondary chip removal flutes are located within the two main flutes to separate and break chips during machining, resulting in finer metal chips and ensuring effective chip breaking. The smaller chips are then quickly discharged through the first and second main chip removal flutes and secondary chip removal flutes. Its advantages are: firstly, this straight flute drill provides excellent chip breaking and removal, achieving efficient drilling... The first advantage is that the metal chips produced are fine and can be quickly discharged, resulting in a smooth cutting process, significantly reduced cutting deformation, and a marked improvement in the surface quality of the drilled hole, leading to a high product yield. Secondly, the cutting fluid easily reaches the bottom of the hole and the drill tip, effectively providing cooling and lubrication, ensuring that machining is carried out at a suitable temperature, greatly improving drill bit life and durability while guaranteeing drilling quality. Thirdly, the new drill bit can maintain a high cutting speed, effectively improving cutting efficiency, meeting the needs of large-scale production, and contributing to better economic and social benefits. Attached Figure Description

[0017] Figure 1 This is a front view schematic diagram of a straight flute drill for drilling aluminum alloys according to one embodiment of the present invention.

[0018] Figure 2 for Figure 1 The diagram shows a partially enlarged schematic of a straight flute drill used for drilling aluminum alloys.

[0019] Figure 3 for Figure 1 The diagram shown is a bottom view of a straight flute drill used for drilling aluminum alloys.

[0020] Blade body 01;

[0021] Cutter head 1, first cutting edge 11, first rake face 110, second cutting edge 12, second rake face 120, first chip removal main groove 13, second chip removal main groove 14, first chip removal secondary groove 15, second chip removal secondary groove 16;

[0022] Handle 2;

[0023] Cooling hole 3. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, while the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0025] Figures 1 to 3A straight flute drill for drilling aluminum alloys is schematically shown according to one embodiment of the present invention. As shown in the figure, the straight flute drill for drilling aluminum alloys includes a cutter body 01, one end of which is a cutter head 1 and the other end is a cylindrical cutter shank 2. The cutter head 1 is characterized by having a first cutting edge 11 and a second cutting edge 12 formed on it.

[0026] A vertical first chip removal main groove 13 is formed between the first rake face 110 of the first cutting edge 11 and the second cutting edge 12, and a vertical second chip removal main groove 14 is formed between the second rake face 120 of the second cutting edge 12 and the first cutting edge 11.

[0027] At least one first chip removal sub-groove 15 is provided on the first rake face 110. The first chip removal sub-groove 15 vertically penetrates the front end face of the first cutting edge 11 and has a lateral opening connecting to the first chip removal main groove 13. At least one second chip removal sub-groove 16 is provided on the second rake face 120. The second chip removal sub-groove 16 vertically penetrates the front end face of the second cutting edge 12 and has a lateral opening connecting to the second chip removal main groove 14. The radial distances of the first chip removal sub-groove 15 and the second chip removal sub-groove 16 on both sides relative to the central axis of the cutter head 1 are different and they are staggered from each other radially. The first chip removal sub-groove 15 and the second chip removal sub-groove 16 are preferably rectangular grooves or arc grooves. The groove structure of this shape has low stress, is easy to process, and also has a good chip breaking effect. The width and depth of the first chip removal sub-groove 15 and the second chip removal sub-groove 16 are both preferably 0.4 mm. This size setting can achieve a good chip breaking effect. The length of the chip removal sub-groove is shorter than the length of the corresponding chip removal main groove. The lengths of the first chip removal sub-groove 15 and the second chip removal sub-groove 16 are preferably 2.5 times the diameter of the cutter head 1. This length setting can achieve good chip breaking and chip removal effects.

[0028] This straight flute drill for aluminum alloy drilling features a first main chip removal flute 13 and a second main chip removal flute 14, which provide excellent chip collection and removal. The two main flutes are equipped with staggered first and second secondary chip removal flutes 15 and 16, which separate and break chips during machining, resulting in finer metal chips and ensuring good chip breaking. Simultaneously, the smaller chips are rapidly discharged through the first main chip removal flute 13, the second main chip removal flute 14, the first secondary chip removal flute 15, and the second secondary chip removal flute 16. Its beneficial effects are: firstly, this straight flute drill provides excellent chip breaking. First, the chip removal process enables the fine and rapid removal of metal chips during drilling, resulting in a smooth cutting process, significantly reduced cutting deformation, and a marked improvement in the surface quality of the drilled hole, leading to a high product yield. Second, the cutting fluid easily reaches the bottom of the hole and the drill tip, effectively providing cooling and lubrication, ensuring that machining is carried out at a suitable temperature, greatly improving drill bit life and durability, while also guaranteeing drilling quality. Third, the cutting speed of this new drill bit can be controlled at a relatively high speed, effectively improving cutting efficiency, meeting the needs of large-scale production, and contributing to better economic and social benefits.

[0029] Furthermore, in one embodiment, the first rake face 110 is provided with two vertical first chip removal sub-grooves 15, and the second rake face 120 is provided with one vertical second chip removal sub-groove 16. Preferably, when there are two first chip removal sub-grooves 15, the radial distance of the second chip removal sub-groove 16 relative to the central axis of the cutter head 1 is twice the distance between the midpoint of the two first chip removal sub-grooves 15 and the central axis of the cutter head 1. Preferably, the radial distance between the centers of the two first chip removal sub-grooves 15 and the central axis of the cutter head 1 is at 76% radius and 36% radius, respectively, and the radial distance between the center of the second chip removal sub-groove 16 and the central axis of the cutter head 1 is at 56% radius. The beneficial effect is that this staggered and evenly distributed arrangement can achieve the best chip breaking effect.

[0030] Furthermore, in another embodiment, a first vertical chip-removing groove 15 is provided on the first rake face 110, and two vertical second chip-removing grooves 16 are provided on the second rake face 120. Preferably, when there are two second chip-removing grooves 16, the radial distance between the first chip-removing groove 16 and the central axis of the cutter head 1 is twice the distance between the midpoint of the two second chip-removing grooves 16 and the central axis of the cutter head 1. Preferably, the radial distance between the centers of the two second chip-removing grooves 16 and the central axis of the cutter head 1 is at 76% radius and 36% radius, respectively, and the radial distance between the center of the first chip-removing groove 15 and the central axis of the cutter head 1 is at 56% radius. The beneficial effect is that this staggered and evenly distributed arrangement can achieve the best chip-breaking effect.

[0031] Furthermore, two cutting edges and two vertical chip-removing main grooves are symmetrically formed on the cutter head 1. Each cutting edge has at least one vertical, laterally opening chip-removing secondary groove connected to the main chip-removing groove on its rake face. The radial distance between each secondary chip-removing groove and the central axis of the cutter head 1 is different, causing the secondary chip-removing grooves on both sides to be radially staggered. The beneficial effect is that the symmetrically arranged cutter head 1 easily distributes stress loads evenly, ensuring stable cutting.

[0032] In embodiment three, a straight flute drill for drilling aluminum alloys includes a cutter body 01, with one end of the cutter body 01 being a cutter head 1 and the other end being a cylindrical cutter shank 2. The cutter head 1 has a first cutting edge 11 and a second cutting edge 12. A vertical first chip removal main groove 13 is formed between the first rake face 110 of the first cutting edge 11 and the second cutting edge 12. A vertical second chip removal main groove 14 is formed between the second rake face 120 of the second cutting edge 12 and the first cutting edge 11. The first rake face 110 and the second rake face 120 are provided with a plurality of vertical first chip removal secondary grooves 15 and second chip removal secondary grooves 16 at equal radial intervals. The beneficial effect is that the evenly distributed chip removal secondary grooves 15 are easy to manufacture and have uniform load distribution.

[0033] In the various embodiments described above, the cutting head 1 and the tool holder 2 are arranged coaxially, and the tool body 01 also has two vertical cooling holes 3, which penetrate the end faces of the cutting head 1 and the tool holder 2. The beneficial effect is that this arrangement easily achieves good cooling quality, ensuring machining speed and cutting quality.

[0034] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A straight flute drill for drilling aluminum alloys, comprising a cutter body (01), wherein one end of the cutter body (01) is a cutter head (1) and the other end is a cylindrical shank (2), characterized in that, A first cutting edge (11) and a second cutting edge (12) are formed on the cutting head (1); A vertical first chip removal main groove (13) is formed between the first rake face (110) of the first cutting edge (11) and the second cutting edge (12), and a vertical second chip removal main groove (14) is formed between the second rake face (120) of the second cutting edge (12) and the first cutting edge (11). The first rake face (110) is provided with at least one first chip removal sub-groove (15), the first chip removal sub-groove (15) penetrates vertically through the front end face of the first cutting edge (11) and has a lateral opening that connects to the first chip removal main groove (13). The second rake face (120) is provided with at least one second chip removal sub-groove (16), the second chip removal sub-groove (16) penetrates vertically through the front end face of the second cutting edge (12) and has a lateral opening that connects to the second chip removal main groove (14). The radial distances of the first chip removal sub-groove (15) and the second chip removal sub-groove (16) on both sides relative to the central axis of the cutting head (1) are different and they are offset from each other radially.

2. A straight flute drill for drilling aluminum alloys according to claim 1, characterized in that, The first rake face (110) is provided with two vertical first chip removal grooves (15), and the second rake face (120) is provided with one vertical second chip removal groove (16).

3. A straight flute drill for drilling aluminum alloys according to claim 2, characterized in that, The radial distance between the second chip removal sub-groove (16) and the central axis of the cutter head (1) is twice the distance between the midpoint of the two first chip removal sub-grooves (15) and the central axis of the cutter head (1).

4. A straight flute drill for drilling aluminum alloys according to claim 3, characterized in that, The centers of the two first chip removal sub-grooves (15) are radially at 76% radius and 36% radius relative to the central axis of the cutter head (1), respectively, and the center of the second chip removal sub-grooves (16) is radially at 56% radius relative to the central axis of the cutter head (1).

5. A straight flute drill for drilling aluminum alloys according to claim 4, characterized in that, The width and depth of the first chip removal sub-groove (15) and the second chip removal sub-groove (16) are uniformly 0.4 mm; the length of the chip removal sub-groove is shorter than the length of the corresponding chip removal main groove.

6. A straight flute drill for drilling aluminum alloys according to claim 5, characterized in that, The lengths of the first chip removal sub-groove (15) and the second chip removal sub-groove (16) are 2.5 times the diameter of the cutter head (1).

7. A straight flute drill for drilling aluminum alloys according to claim 6, characterized in that, Both the first chip removal sub-groove (15) and the second chip removal sub-groove (16) are rectangular grooves or circular arc grooves.

8. A straight flute drill for drilling aluminum alloys according to claim 7, characterized in that, The cutter head (1) has two symmetrical cutting edges and two vertical chip removal main grooves, and the chip removal secondary grooves on the rake face of the two cutting edges are radially offset from each other.

9. A straight flute drill for drilling aluminum alloys according to any one of claims 1 to 8, characterized in that, The cutting head (1) and the handle (2) are arranged on the same axis. The cutting body (01) forms two vertical cooling holes (3), which penetrate the end faces of the cutting head (1) and the handle (2).

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